PHP delete contents of file- before writing to it
could somebody help me with the following php/wordpress script?
I have created a cron job, which will write all post data to a custom XML file. The Cron job is set to go once daily, and works, but the problem i am having is that, it does not delete the contents of the file each night, just adds to the original file, making duplicate entries.
How would i change the script below, so that the first thing the script does is empy the file, before writing the data each day.
I have created a cron job, which will write all post data to a custom XML file. The Cron job is set to go once daily, and works, but the problem i am having is that, it does not delete the contents of the file each night, just adds to the original file, making duplicate entries.
How would i change the script below, so that the first thing the script does is empy the file, before writing the data each day.
//add_filter( 'save_post', 'xml_feed_creation_rr');
if ( ! wp_next_scheduled( 'xml_generate_cron_hook_rr' ) ) {
wp_schedule_event( time(), 'daily', 'xml_generate_cron_hook_rr' );
}
add_action( 'xml_generate_cron_hook_rr', 'xml_generate_cron_exec_rr' );
function xml_generate_cron_exec_rr(){
file_put_contents('/filepath/wp-content/themes/Avada-Child/RRfeed.xml', '');
$numposts = 50000; // number of posts in feed
$posts = query_posts('showposts='.$numposts.'');
$more = 1;
$xmlWriter = new XMLWriter();
$xmlWriter->openMemory();
$xmlWriter->setIndent(true);
$xmlWriter->startDocument('1.0', 'UTF-8');
$xmlWriter->startElement('source');
$xmlWriter->writeElement('publisher', 'Myself');
$xmlWriter->writeElement('publisherurl', 'http://mysite.com/');
$xmlWriter->writeElement('lastBuildDate', mysql2date('D, d M Y H:i:s +0000', strtotime('Today')));
$counter = 0;
while(have_posts()) : the_post(); ?>
<?php $zips = get_field('zipcode');
$zips_array = explode(' ',$zips);
foreach($zips_array as $zip){
$counter++;
$xmlWriter->startElement('job');
$xmlWriter->startElement('title');
$xmlWriter->writeCData( get_the_title_rss() );
$xmlWriter->endElement();
$xmlWriter->startElement('date');
$xmlWriter->writeCData( mysql2date('D, d M Y H:i:s +0000', get_post_time('Y-m-d H:i:s', true), false) );
$xmlWriter->endElement();
$xmlWriter->startElement('referencenumber');
$xmlWriter->writeCData( get_the_id().$zip );
$xmlWriter->endElement();
$xmlWriter->startElement('url');
$xmlWriter->writeCData( get_permalink() );
$xmlWriter->endElement();
$xmlWriter->startElement('company');
$xmlWriter->writeCData( 'Compnay' );
$xmlWriter->endElement();
$xmlWriter->startElement('city');
$xmlWriter->writeCData( get_field('city') );
$xmlWriter->endElement();
$xmlWriter->startElement('state');
$xmlWriter->writeCData( get_field('state') );
$xmlWriter->endElement();
$xmlWriter->startElement('country');
$xmlWriter->writeCData( 'US' );
$xmlWriter->endElement();
$xmlWriter->startElement('postalcode');
$xmlWriter->writeCData( $zip );
$xmlWriter->endElement();
if (get_option('rss_use_excerpt')) :
$xmlWriter->startElement('description');
$xmlWriter->writeCData( get_the_excerpt() );
$xmlWriter->endElement();
$xmlWriter->startElement('applylink');
$xmlWriter->writeCData( 'https://intelliapp2.driverapponline.com/c/cr?r=XMLFeed' );
$xmlWriter->endElement();
else :
$xmlWriter->startElement('description');
$xmlWriter->writeCData( get_the_excerpt() );
$xmlWriter->endElement();
$xmlWriter->startElement('applylink');
$xmlWriter->writeCData( 'https://intelliapp2.driverapponline.com/c/cr?r=XMLFeed' );
$xmlWriter->endElement();
if ( strlen( get_the_content() ) > 0 ) :
$xmlWriter->startElement('content');
$xmlWriter->writeCData( apply_filters('the_content', get_the_content()) );
$xmlWriter->endElement();
else :
$xmlWriter->startElement('content');
$xmlWriter->writeCData( apply_filters('the_content', get_the_excerpt()) );
$xmlWriter->endElement();
endif;
endif;
$xmlWriter->startElement('salary');
$xmlWriter->writeCData( do_shortcode( get_post_meta( get_the_id(), 'salary', true ) ) );
$xmlWriter->endElement();
$xmlWriter->startElement('experience');
$xmlWriter->writeCData( do_shortcode( '[Qualifications]' ) );
$xmlWriter->endElement();
$xmlWriter->startElement('jobtype');
$xmlWriter->writeCData( get_field('jobtype') );
$xmlWriter->endElement();
$xmlWriter->startElement('category');
$xmlWriter->writeCData( strip_tags(get_the_category_list(' ')) );
$xmlWriter->endElement();
$xmlWriter->endElement();
// Flush XML in memory to file every 1000 iterations
if (0 == $counter%1000) {
file_put_contents('/filepath/wp-content/themes/Avada-Child/RRfeed.xml', $xmlWriter->flush(true), FILE_APPEND);
}
}
endwhile;
$xmlWriter->endElement();
$xmlWriter->endDocument();
//Final flush to make sure we haven't missed anything
file_put_contents('/filepath/wp-content/themes/Avada-Child/RRfeed.xml', $xmlWriter->flush(true), FILE_APPEND);
}
You can use fopen with 'w' which will truncate the file
http://www.php.net/manual/en/function.fopen.php
fopen('/filepath/wp-content/themes/Avada-Child/RRfeed.xml', 'w');http://www.php.net/manual/en/function.fopen.php
Why would you use fopen() when the script is already using file_put_contents()? That just sounds like a red herring, when all you have to do is remove FILE_APPEND from the file_put_contents() statement.
ASKER
So just to be double sure.
I put the Unlink at the very top, -- that deletes the file or contents.
Then I create the file with the new fresh data.
I had the FILE_APPEND in because the XML file is very big, so wanted to cut down memory usage etc.
I put the Unlink at the very top, -- that deletes the file or contents.
Then I create the file with the new fresh data.
I had the FILE_APPEND in because the XML file is very big, so wanted to cut down memory usage etc.
//add_filter( 'save_post', 'xml_feed_creation_rr');
if ( ! wp_next_scheduled( 'xml_generate_cron_hook_rr' ) ) {
wp_schedule_event( time(), 'daily', 'xml_generate_cron_hook_rr' );
}
add_action( 'xml_generate_cron_hook_rr', 'xml_generate_cron_exec_rr' );
function xml_generate_cron_exec_rr(){
// Delete the existing file
unlink('/filepath/wp-content/themes/Avada-Child/RRfeed.xml);
// Create new file.
file_put_contents('/filepath/wp-content/themes/Avada-Child/RRfeed.xml', '');
$numposts = 50000; // number of posts in feed
$posts = query_posts('showposts='.$numposts.'');
$more = 1;
$xmlWriter = new XMLWriter();
$xmlWriter->openMemory();
$xmlWriter->setIndent(true);
$xmlWriter->startDocument('1.0', 'UTF-8');
$xmlWriter->startElement('source');
$xmlWriter->writeElement('publisher', 'Myself');
$xmlWriter->writeElement('publisherurl', 'http://mysite.com/');
$xmlWriter->writeElement('lastBuildDate', mysql2date('D, d M Y H:i:s +0000', strtotime('Today')));
$counter = 0;
while(have_posts()) : the_post(); ?>
<?php $zips = get_field('zipcode');
$zips_array = explode(' ',$zips);
foreach($zips_array as $zip){
$counter++;
$xmlWriter->startElement('job');
$xmlWriter->startElement('title');
$xmlWriter->writeCData( get_the_title_rss() );
$xmlWriter->endElement();
$xmlWriter->startElement('date');
$xmlWriter->writeCData( mysql2date('D, d M Y H:i:s +0000', get_post_time('Y-m-d H:i:s', true), false) );
$xmlWriter->endElement();
$xmlWriter->startElement('referencenumber');
$xmlWriter->writeCData( get_the_id().$zip );
$xmlWriter->endElement();
$xmlWriter->startElement('url');
$xmlWriter->writeCData( get_permalink() );
$xmlWriter->endElement();
$xmlWriter->startElement('company');
$xmlWriter->writeCData( 'Compnay' );
$xmlWriter->endElement();
$xmlWriter->startElement('city');
$xmlWriter->writeCData( get_field('city') );
$xmlWriter->endElement();
$xmlWriter->startElement('state');
$xmlWriter->writeCData( get_field('state') );
$xmlWriter->endElement();
$xmlWriter->startElement('country');
$xmlWriter->writeCData( 'US' );
$xmlWriter->endElement();
$xmlWriter->startElement('postalcode');
$xmlWriter->writeCData( $zip );
$xmlWriter->endElement();
if (get_option('rss_use_excerpt')) :
$xmlWriter->startElement('description');
$xmlWriter->writeCData( get_the_excerpt() );
$xmlWriter->endElement();
$xmlWriter->startElement('applylink');
$xmlWriter->writeCData( 'https://intelliapp2.driverapponline.com/c/cr?r=XMLFeed' );
$xmlWriter->endElement();
else :
$xmlWriter->startElement('description');
$xmlWriter->writeCData( get_the_excerpt() );
$xmlWriter->endElement();
$xmlWriter->startElement('applylink');
$xmlWriter->writeCData( 'https://intelliapp2.driverapponline.com/c/cr?r=XMLFeed' );
$xmlWriter->endElement();
if ( strlen( get_the_content() ) > 0 ) :
$xmlWriter->startElement('content');
$xmlWriter->writeCData( apply_filters('the_content', get_the_content()) );
$xmlWriter->endElement();
else :
$xmlWriter->startElement('content');
$xmlWriter->writeCData( apply_filters('the_content', get_the_excerpt()) );
$xmlWriter->endElement();
endif;
endif;
$xmlWriter->startElement('salary');
$xmlWriter->writeCData( do_shortcode( get_post_meta( get_the_id(), 'salary', true ) ) );
$xmlWriter->endElement();
$xmlWriter->startElement('experience');
$xmlWriter->writeCData( do_shortcode( '[Qualifications]' ) );
$xmlWriter->endElement();
$xmlWriter->startElement('jobtype');
$xmlWriter->writeCData( get_field('jobtype') );
$xmlWriter->endElement();
$xmlWriter->startElement('category');
$xmlWriter->writeCData( strip_tags(get_the_category_list(' ')) );
$xmlWriter->endElement();
$xmlWriter->endElement();
// Flush XML in memory to file every 1000 iterations
if (0 == $counter%1000) {
file_put_contents('/filepath/wp-content/themes/Avada-Child/RRfeed.xml', $xmlWriter->flush(true), FILE_APPEND);
}
}
endwhile;
$xmlWriter->endElement();
$xmlWriter->endDocument();
//Final flush to make sure we haven't missed anything
file_put_contents('/filepath/wp-content/themes/Avada-Child/RRfeed.xml', $xmlWriter->flush(true), FILE_APPEND);
}ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
Brilliant, I get it now.
If you don't want to append to the existing file, you can remove FILE_APPEND from line 124 and 131.
http://php.net/manual/en/function.file-put-contents.php
After you remove FILE_APPEND line 11 will not be necessary because the RRfeed.xml will be overwritten.